trivial: move native forward testing
trivial: move native forward testing

jnishi/chainer,ktnyt/chainer,wkentaro/chainer,hvy/chainer,hvy/chainer,chainer/chainer,niboshi/chainer,ktnyt/chainer,ktnyt/chainer,chainer/chainer,niboshi/chainer,okuta/chainer,okuta/chainer,ktnyt/chainer,tkerola/chainer,okuta/chainer,wkentaro/chainer,niboshi/chainer,okuta/chainer,keisuke-umezawa/chainer,chainer/chainer,hvy/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,jnishi/chainer,hvy/chainer,keisuke-umezawa/chainer,wkentaro/chainer,jnishi/chainer,chainer/chainer,wkentaro/chainer,jnishi/chainer,pfnet/chainer,niboshi/chainer